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10/15/2009, 05:32 PM
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#1 |
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Registered Member
Join Date: Dec 2002
Location: Arkansas
Posts: 243
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hooking up a dual TDS meter
How will I hook this up to my RO/DI filter system so I can tell when to change cartriges?
easygoer2 |
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10/15/2009, 06:59 PM
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#2 |
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Registered Member
Join Date: Apr 2007
Location: Michigan
Posts: 49
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the best way to hook your TDS is at the input and output ,product water on the membrane.I change filters every six mths. and the DI when color changes.This way you can monitor the membrane.when it reaches around 8% I discard the old membrane
Last edited by blueye; 10/15/2009 at 07:37 PM. |
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10/15/2009, 08:26 PM
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#3 |
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Registered Member
Join Date: Jan 2009
Location: Great White North
Posts: 66
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I put one probe right after the membrane and the other one right after the DI unit. That way when the numbers go up you know which filter is due. For the sediment and carbon filters follow the manufacturers directions.
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20g tank, 20g sump/ref, coralife skimmer 30lbs LR, chaetos, 6 astrea 96w T5HO 2 clarkii clowns, 1 firefish, 1 blood shrimp red, blue and hairy mushrooms, frogspawn, Pumping Zenia, Blue Snowflake, Zoanthids, Hammer, ricordia, cocoa worm, blue ridge, Candy Cane, Green Acropora Never mind your tank let me see your sump Current Tank Info: Up since july 1 2009 |
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10/16/2009, 04:15 AM
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#4 |
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.Registered Member
Join Date: Sep 2006
Location: Cincinnati, Ohio
Posts: 4,857
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Remember that the prefilters (sediment filter, carbon block(s)), that ism, all the filters that come before the membrane, don't remove tds - so that meter won't tell you when they need to be changed. TDS is removed by the membrane and the DI - so the suggestions above are good. Install the "in" probe on the tube that feeds the DI, and the "out" probe on the tube leading from the "out" port of the DI.
Measure and record with a borrowed meter or with a temporary installation of one of the probes, the TDS of your feedwater. Russ |
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10/16/2009, 08:01 PM
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#5 | |
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Registered Member
Join Date: Apr 2007
Location: Michigan
Posts: 49
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Quote:
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10/17/2009, 07:15 AM
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#6 |
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Reef Chemist
 
Join Date: Apr 2001
Location: Arlington, Massachusetts
Posts: 86,233
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I do not recommend changing DI based on color changes in it. Bad things can easily begin to get out before the color changes. TDS is a much better way to monitor the DI.
I discuss RO/DI issues here: Reverse Osmosis/Deionization Systems to Purify Tap Water for Reef Aquaria http://reefkeeping.com/issues/2005-05/rhf/index.htm
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Randy Holmes-Farley Current Tank Info: 120 mixed reef |
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